{"id":"CVE-2026-98370","published":"2026-10-06T09:18:31.450","lastModified":"2026-10-06T09:18:31.450","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfrm: fix compat ALLOCSPI request use-after-free\n\nxfrm_state_netlink() builds the ALLOCSPI response with\ndump_one_state(), which already calls alloc_compat() with the response\nskb and header.\n\nxfrm_alloc_userspi() then calls alloc_compat() again, but passes the\noriginal request skb and its header. For a compat request, the\ntranslator therefore interprets the 228-byte compat xfrm_userspi_info\nas the 232-byte native layout and reads four bytes past the declared\npayload. It also publishes the translated child through the request's\nfrag_list.\n\nA multicast clone of the request shares skb_shared_info and can observe\nthat child. xfrm_user_rcv_msg() frees it after the request handler\nreturns, racing a compat receiver which may still be copying from it and\nresulting in a use-after-free.\n\nRemove the redundant conversion. The response keeps its correct compat\ntranslation from dump_one_state(), and no child is attached to the\ninbound request.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/17893987e52918c23945c42e47e894a936305a25","tags":[]},{"url":"https://git.kernel.org/stable/c/248433942155b42a0ef04a5806c8aca024ea7c33","tags":[]},{"url":"https://git.kernel.org/stable/c/2b63341e2ebc9b6f73cbd9214dbe7d46dd98c718","tags":[]},{"url":"https://git.kernel.org/stable/c/42971ea17c7a8afc0bdd5ca40648bf4e5bb7b810","tags":[]},{"url":"https://git.kernel.org/stable/c/494f2bee9d8d0ebcfa249ac41bed7fed26d119b4","tags":[]},{"url":"https://git.kernel.org/stable/c/bb63ab52a18273ec68340ac49aebbaa7b514ccd5","tags":[]},{"url":"https://git.kernel.org/stable/c/d1ebd9081879fd9ae9c8fb7e8928f19cc88ae320","tags":[]},{"url":"https://git.kernel.org/stable/c/e70f639aee2ff0def155c256cace9e0f81d998e2","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}